Going forward, Tesla said it would publish the number of new car deliveries within three days of quarter end.

"We have decided to take this approach, because inaccurate sources of information are sometimes used by others to project the number of vehicle deliveries," the statement said.

The statement noted that "this is only one measure of our financial performance and should not be relied on as an indicator of our quarterly financial results, which depend on a variety of factors, including the cost of sales, foreign exchange movements and mix of directly leased vehicles."

While Tesla produces relatively few vehicles, it has become a star in the sector due to keen demand and a reputation for high quality.

The company currently produces its luxury Model S, costing upwards of $69,000 but it is planning new vehicles including a more affordable model.

Last year the group sold some 55,000 vehicles.

Tesla has offered to allow rivals to use its patents for free in an effort to boost the electric car sector, and has made efforts to improve the range of the vehicles to ease concerns that they could lose power without a nearby charging station.

Earlier this week, Musk tweeted that the company would unveil a "major" new product line next month, leaving analysts guessing.

Some reports said Musk was likely referring to a home battery based on a design used in the Tesla vehicles, which he spoke about during a February earnings call.